JP4672798B2 - 自由空間光通信におけるクロストーク低減方法 - Google Patents
自由空間光通信におけるクロストーク低減方法 Download PDFInfo
- Publication number
- JP4672798B2 JP4672798B2 JP2009519485A JP2009519485A JP4672798B2 JP 4672798 B2 JP4672798 B2 JP 4672798B2 JP 2009519485 A JP2009519485 A JP 2009519485A JP 2009519485 A JP2009519485 A JP 2009519485A JP 4672798 B2 JP4672798 B2 JP 4672798B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- dispersion
- pulse
- adjustment module
- optical communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/118—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/112—Line-of-sight transmission over an extended range
- H04B10/1121—One-way transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
- Communication Cables (AREA)
Description
図面及び文章において、同様の符号は同様の機能を持つ要素を示す。
図面において、構成の相対寸法は1以上の構造をより明確に示すために誇張してある場合もある。
Claims (12)
- 装置であって、
変調器、分散調整モジュール及び光増幅器を含む光送信機であって、光パルスを自由空間光通信チャネルを介して送信するように構成された送信機
を備え、
該変調器が、データによって振幅及び/又は位相変調される光キャリアを生成するように構成され、
該分散調整モジュールが、該変調器と該増幅器の間に接続され、該変調器からの受信光パルスの時間幅を、該受信光パルスの分散を変化させることによって変化させるように構成された装置。 - 請求項1の装置であって、さらに、該光増幅器を介して通過してきた光パルスが時間的に狭められるように接続されている第2の分散調整モジュールを備えた装置。
- 請求項2の装置において、該第2の分散調整モジュールが該光送信機内に位置する装置。
- 請求項2の装置であって、さらに、
該自由空間光通信チャネルからの送信光パルスを受信するように配置された光受信機を備え、
該第2の分散調整モジュールが該光受信機内に位置する装置。 - 請求項3の装置であって、さらに、
該自由空間光通信チャネルからの送信光パルスを受信するように配置された光受信機、及び
該光増幅器を介して通過してきた光パルスが時間的に狭められるように接続されている第3の分散調整モジュール
を備え、該第3の分散調整モジュールが該光受信機内に位置する装置。 - 請求項2の装置において、該第2の分散調整モジュールが受信光パルスの時間幅を20%以上減少させるように構成された装置。
- 方法であって、
変調光キャリアを生成することによって光パルスのストリームを生成するステップ、
該ストリームの光パルスの分散を変化させて時間的に拡げられた対応する光パルスを生成する、(分散を変化させる)ステップ、
該時間的に拡げられた光パルスを光学的に増幅して対応する増幅された光パルスを生成する、(増幅するステップ)、及び
該増幅された光パルスを光受信機へ自由空間光通信チャネルを介して送信するステップ
を備える方法。 - 請求項7の方法であって、さらに、
光学的に増幅された光パルスの分散を変化させて時間的に狭められた対応する光パルスを生成する、(分散を変化させる)ステップを備える方法。 - 請求項7の方法において、該分散を変化させるステップが、該ストリームの光パルスの時間幅を少なくとも25%増加させる方法。
- 請求項7の方法において、該光学的に増幅された光パルスの分散を変化させるステップが、該光学的に増幅されたパルスの時間幅を20%以上減少させるステップを含む方法。
- 請求項1の装置において、前記受信光パルスの分散を変化させることが該受信光パルスの時間幅の拡大をもたらす、装置。
- 請求項11の装置において、前記光パルスの時間幅の拡大が前記受信光パルスのピーク輝度の減少をもたらす、装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/485,091 US7266257B1 (en) | 2006-07-12 | 2006-07-12 | Reducing crosstalk in free-space optical communications |
PCT/US2007/015705 WO2008105800A2 (en) | 2006-07-12 | 2007-07-10 | Reducing crosstalk in free-space optical communications |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009543520A JP2009543520A (ja) | 2009-12-03 |
JP4672798B2 true JP4672798B2 (ja) | 2011-04-20 |
Family
ID=38456975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009519485A Expired - Fee Related JP4672798B2 (ja) | 2006-07-12 | 2007-07-10 | 自由空間光通信におけるクロストーク低減方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7266257B1 (ja) |
EP (1) | EP2044708B1 (ja) |
JP (1) | JP4672798B2 (ja) |
KR (1) | KR101018606B1 (ja) |
CN (1) | CN101490984B (ja) |
AT (1) | ATE449474T1 (ja) |
DE (1) | DE602007003376D1 (ja) |
WO (1) | WO2008105800A2 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7561625B1 (en) | 2006-02-06 | 2009-07-14 | Advanced Micro Devices, Inc. | Method and apparatus for crosstalk reduction |
US7603038B1 (en) * | 2006-09-05 | 2009-10-13 | Los Alamos National Security, Llc | System and method that suppresses intensity fluctuations for free space high-speed optical communication |
US8634974B2 (en) * | 2012-01-09 | 2014-01-21 | Google Inc. | Using predicted movement to maintain optical-communication lock with nearby balloon |
KR20170008975A (ko) * | 2015-07-15 | 2017-01-25 | 한국과학기술원 | 펨토초 레이저의 광빗을 이용한 대기 중의 위상 노이즈의 자동 보상을 통한 자유공간 가간섭 광통신 장치 및 방법 |
US20180053666A1 (en) * | 2016-08-19 | 2018-02-22 | Applied Materials, Inc. | Substrate carrier with array of independently controllable heater elements |
WO2019033111A1 (en) * | 2017-08-11 | 2019-02-14 | Optipulse Inc. | LASER GRID STRUCTURES FOR HIGH-SPEED WIRELESS DATA TRANSFERS |
US10374705B2 (en) | 2017-09-06 | 2019-08-06 | Optipulse Inc. | Method and apparatus for alignment of a line-of-sight communications link |
US10925114B1 (en) | 2019-11-11 | 2021-02-16 | Loon Llc | Remote monitoring of geographically distributed assets using mobile platforms |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0774699A (ja) * | 1993-09-03 | 1995-03-17 | Hitachi Ltd | 光伝送システム |
JPH09284218A (ja) * | 1996-04-19 | 1997-10-31 | Fujitsu Ltd | 光伝送システム |
JPH10242909A (ja) * | 1997-02-27 | 1998-09-11 | Fujitsu Ltd | 光伝送システム |
JP2003529279A (ja) * | 2000-03-27 | 2003-09-30 | イェ−スン リー | 波長分割多重化無線光通信システム |
JP2005269667A (ja) * | 1994-08-02 | 2005-09-29 | Fujitsu Ltd | 光伝送システム、光多重伝送システム及びその周辺技術 |
JP2006094465A (ja) * | 2004-08-24 | 2006-04-06 | Hamamatsu Photonics Kk | 光無線通信装置 |
Family Cites Families (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0239131A (ja) | 1988-07-29 | 1990-02-08 | Hitachi Ltd | 周波数間隔安定化方法、光ヘテロダイン又は光ホモダイン通信方法 |
DE69026766T2 (de) | 1989-05-18 | 1996-11-28 | Sony Corp | Verfahren zur Kontrolle der ferroelektrischen Domänen eines nichtlinearen optischen Substrates |
US5141459A (en) | 1990-07-18 | 1992-08-25 | International Business Machines Corporation | Structures and processes for fabricating field emission cathodes |
US5334908A (en) | 1990-07-18 | 1994-08-02 | International Business Machines Corporation | Structures and processes for fabricating field emission cathode tips using secondary cusp |
JP2602584B2 (ja) | 1990-07-18 | 1997-04-23 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | 電界放出陰極構造を製造する方法 |
US5218771A (en) | 1992-04-15 | 1993-06-15 | Redford Peter M | Orientation sensing apparatus |
JP3244529B2 (ja) | 1992-04-16 | 2002-01-07 | アジレント・テクノロジーズ・インク | 面発光型第2高調波生成素子 |
US5345456A (en) | 1993-03-11 | 1994-09-06 | National Research Council Of Canada | Spatially addressable surface emission sum frequency device |
US5355247A (en) | 1993-03-30 | 1994-10-11 | The Board Of Trustees Of The Leland Stanford, Jr. University | Method using a monolithic crystalline material for producing radiation by quasi-phase-matching, diffusion bonded monolithic crystalline material for quasi-phase-matching, and method for fabricating same |
US5363021A (en) | 1993-07-12 | 1994-11-08 | Cornell Research Foundation, Inc. | Massively parallel array cathode |
US5814156A (en) | 1993-09-08 | 1998-09-29 | Uvtech Systems Inc. | Photoreactive surface cleaning |
SE9400824D0 (sv) | 1994-03-10 | 1994-03-10 | Siemens Elema Ab | Anordning för optisk överföring |
US5440574A (en) | 1994-06-02 | 1995-08-08 | Spectra-Physics Laserplane, Inc. | Solid-state laser |
US5479431A (en) | 1994-06-02 | 1995-12-26 | Spectra-Physics Laserplane, Inc. | Solid-state laser with active etalon and method therefor |
US5450429A (en) | 1994-06-02 | 1995-09-12 | Spectra-Physics Laserplane, Inc. | Efficient linear frequency doubled solid-state laser |
US5420876A (en) | 1994-06-02 | 1995-05-30 | Spectra-Physics Laserplane, Inc. | Gadolinium vanadate laser |
JPH0851248A (ja) | 1994-08-09 | 1996-02-20 | Hitachi Ltd | 内部共振型面発光shgレーザ |
US5800767A (en) | 1994-09-16 | 1998-09-01 | The Board Of Trustees Of The Leland Stanford Junior University | Electric field domain patterning |
DE19601991A1 (de) | 1995-01-31 | 1996-08-01 | Zeiss Carl Fa | Laser-Anordung und Verfahren zum Betrieb einer derartigen Laser-Anordnung |
US5628659A (en) | 1995-04-24 | 1997-05-13 | Microelectronics And Computer Corporation | Method of making a field emission electron source with random micro-tip structures |
US5915164A (en) | 1995-12-28 | 1999-06-22 | U.S. Philips Corporation | Methods of making high voltage GaN-A1N based semiconductor devices |
JP2917898B2 (ja) | 1996-03-29 | 1999-07-12 | 日本電気株式会社 | 電界放出冷陰極素子およびその使用方法 |
US6584245B1 (en) | 1996-05-06 | 2003-06-24 | Teracomm Research, Inc | High speed data link including a superconductive plate assembly for use in a data transmission scheme and method |
SE514821C2 (sv) * | 1997-11-24 | 2001-04-30 | Ericsson Telefon Ab L M | Förfarande och anordning för överhörningsreducering i en dubbelrikad optisk länk |
US6218771B1 (en) | 1998-06-26 | 2001-04-17 | University Of Houston | Group III nitride field emitters |
US6555293B1 (en) | 1998-12-14 | 2003-04-29 | The Board Of Trustees Of The Leland Stanford Junior University | Method for fabricating efficient sources of electromagnetic radiation |
US6351482B1 (en) | 1998-12-15 | 2002-02-26 | Tera Comm Research, Inc | Variable reflectivity mirror for increasing available output power of a laser |
US6172325B1 (en) | 1999-02-10 | 2001-01-09 | Electro Scientific Industries, Inc. | Laser processing power output stabilization apparatus and method employing processing position feedback |
US7161148B1 (en) | 1999-05-31 | 2007-01-09 | Crystals And Technologies, Ltd. | Tip structures, devices on their basis, and methods for their preparation |
US6631246B2 (en) | 1999-06-14 | 2003-10-07 | Lucent Technologies Inc. | Wavelength division multiplexed optical communication system having tunable multi-channel dispersion compensating filters |
AU2001272903A1 (en) * | 2000-04-14 | 2001-10-30 | The Regents Of The University Of California | Method and apparatus for arbitrary waveform generation using photonics |
US20020181059A1 (en) | 2000-11-07 | 2002-12-05 | Christopher Paul F. | Broadband communication for satellite-ground or air-ground links |
US6741763B1 (en) * | 2001-01-17 | 2004-05-25 | The Texas A & M University | Optical data transmission apparatus and method |
US6424444B1 (en) * | 2001-01-29 | 2002-07-23 | Stratalight Communications, Inc. | Transmission and reception of duobinary multilevel pulse-amplitude-modulated optical signals using finite-state machine-based encoder |
JP2002270516A (ja) | 2001-03-07 | 2002-09-20 | Nec Corp | Iii族窒化物半導体の成長方法、iii族窒化物半導体膜およびそれを用いた半導体素子 |
US6448100B1 (en) | 2001-06-12 | 2002-09-10 | Hewlett-Packard Compnay | Method for fabricating self-aligned field emitter tips |
US6807321B2 (en) | 2002-03-11 | 2004-10-19 | Lucent Technologies Inc. | Apparatus and method for measurement and adaptive control of polarization mode dispersion in optical fiber transmission systems |
US6856450B2 (en) | 2002-04-15 | 2005-02-15 | Lucent Technologies Inc. | Method and apparatus for generating a sequence of optical wavelength bands |
US6748142B2 (en) | 2002-04-24 | 2004-06-08 | Lucent Technologies Inc. | Integrated optical dual dispersion compensator for compensating both chromatic and polarization mode dispersion |
WO2004025733A1 (en) | 2002-09-16 | 2004-03-25 | Hrl Laboratories, Llc | Non-planar nitride-based semiconductor structure and metehod for fabricating the same |
US7099073B2 (en) | 2002-09-27 | 2006-08-29 | Lucent Technologies Inc. | Optical frequency-converters based on group III-nitrides |
US7359639B2 (en) * | 2004-05-04 | 2008-04-15 | L-3 Communications Corporation | Airborne free space optical communication apparatus and method with subcarrier multiplexing |
US7447439B2 (en) * | 2004-05-07 | 2008-11-04 | Enablence Inc. | Optical duplexer and optical triplexer |
-
2006
- 2006-07-12 US US11/485,091 patent/US7266257B1/en not_active Expired - Fee Related
-
2007
- 2007-07-10 WO PCT/US2007/015705 patent/WO2008105800A2/en active Application Filing
- 2007-07-10 DE DE602007003376T patent/DE602007003376D1/de active Active
- 2007-07-10 KR KR1020097000545A patent/KR101018606B1/ko not_active IP Right Cessation
- 2007-07-10 AT AT07873728T patent/ATE449474T1/de not_active IP Right Cessation
- 2007-07-10 JP JP2009519485A patent/JP4672798B2/ja not_active Expired - Fee Related
- 2007-07-10 EP EP07873728A patent/EP2044708B1/en not_active Not-in-force
- 2007-07-10 CN CN2007800264756A patent/CN101490984B/zh not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0774699A (ja) * | 1993-09-03 | 1995-03-17 | Hitachi Ltd | 光伝送システム |
JP2005269667A (ja) * | 1994-08-02 | 2005-09-29 | Fujitsu Ltd | 光伝送システム、光多重伝送システム及びその周辺技術 |
JPH09284218A (ja) * | 1996-04-19 | 1997-10-31 | Fujitsu Ltd | 光伝送システム |
JPH10242909A (ja) * | 1997-02-27 | 1998-09-11 | Fujitsu Ltd | 光伝送システム |
JP2003529279A (ja) * | 2000-03-27 | 2003-09-30 | イェ−スン リー | 波長分割多重化無線光通信システム |
JP2006094465A (ja) * | 2004-08-24 | 2006-04-06 | Hamamatsu Photonics Kk | 光無線通信装置 |
Also Published As
Publication number | Publication date |
---|---|
JP2009543520A (ja) | 2009-12-03 |
KR101018606B1 (ko) | 2011-03-04 |
US7266257B1 (en) | 2007-09-04 |
CN101490984A (zh) | 2009-07-22 |
KR20090029260A (ko) | 2009-03-20 |
ATE449474T1 (de) | 2009-12-15 |
WO2008105800A2 (en) | 2008-09-04 |
EP2044708B1 (en) | 2009-11-18 |
EP2044708A2 (en) | 2009-04-08 |
WO2008105800A3 (en) | 2008-11-06 |
CN101490984B (zh) | 2012-10-10 |
DE602007003376D1 (de) | 2009-12-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4672798B2 (ja) | 自由空間光通信におけるクロストーク低減方法 | |
US7200338B2 (en) | Method and system for communicating a clock signal over an optical link | |
US20090136229A1 (en) | Method and System for Transmitting Information in an Optical Communication System Using Distributed Amplification | |
JP5018453B2 (ja) | 波長多重伝送システム | |
JP2003060580A (ja) | 光通信システム | |
JP2009177641A (ja) | 光信号処理装置、光受信装置および光中継装置 | |
CN100461660C (zh) | 用于多路分解非强度调制的波分复用信号的方法和*** | |
US7200344B1 (en) | Receiver and method for a multichannel optical communication system | |
JP2002164846A (ja) | 光伝送システム | |
WO2017123489A1 (en) | Optical spatial multiplexing usable at short reach | |
Oh et al. | 10 Gbps all-optical full-duplex indoor optical wireless communication with wavelength reuse | |
JP4469295B2 (ja) | 光通信方法および装置 | |
US7379235B2 (en) | Reducing polarization dependence of a wavelength dispersion variation monitor | |
JP2005260696A (ja) | 光送信装置、光伝送システム及び信号光変調方法 | |
JP2005538612A (ja) | 高いビットレートの光時分割多元接続のためのシステム及び方法 | |
US20040208622A1 (en) | Method and apparatus for signal conditioning of optical signals for fiber-optic transmission | |
Hurh et al. | Weather-insensitive optical free-space communication using gain-saturated optical fiber amplifiers | |
Gupta et al. | 3.2 Tbit/s (40× 80 Gb/s) transmission over 1000 km with 100 km span (25 dB loss) and 0.8 bit/s/Hz of spectral efficiency | |
MOREIRA et al. | de Almeida | |
Bobrovs et al. | Design and Implementation of WDM-PON Solutions | |
KR100198948B1 (ko) | 신호대 잡음비가 개선된 광전송장치 | |
KR20000026692A (ko) | 신호대 잡음비가 개선된 잡음 광원을 이용한 광전송장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20100419 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100426 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100726 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20101222 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110119 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140128 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |